Pusher plate for a bookbinding machine



FIG. 1 is a left perspective view of a pusher plate for a bookbinding machine;

FIG. 2 is a right perspective view thereof;

FIG. 3 is a top, rear perspective view thereof; and

FIG. 4 is a right, bottom perspective view thereof. 

The ornamental design for a pusher plate for a bookbinding machine, as shown. 